Can someone provide info on the growing habits of brandywine reds?

I planted all heirlooms this year and while most seem to be growing,getting taller and filling with leaves and flowers, the Brandys ( there are 4) grow so slowly. There are some flowers and even a small tomato on the tallest but all 4 don't look like they've gained much height since planting them 4 weeks ago. Is this normal? The largest is about 16inches and the other 3 stand at about 6-7inches high, no flowers. All have thick, healthy stems and nice leaf growth

The slow poke Brandys were bought as transplants. Should I keep watching water boil and let them have more time or replant the little ones?

thanks for the advice.